Share currrent page on Facebook

facebook_dynamic_sharing.js

function shareOnFacebookButton() {
      var dynamicUrl = "https://www.facebook.com/sharer/sharer.php"
                        + "?"
                        + "u=" + window.location.href; 
                        
      var fbButton = document.createElement("a");
      fbButton.id = "facebook-url";
      fbButton.href = dynamicUrl;
      fbButton.innerText = "Share on Facebook";
      document.body.appendChild(fbButton);
}